Pump valve with gas chamber in cage



June 11, 1940. E. G. WARE PUMP VALVE wzcm ens CHAMBER m CAGE Filed Aug.27, 1938 INVENTOR. 6. ME]: MM, ATTORNEYS.

Patented June 11, 1940 UNITED STATES OFFICE 2,203,759 I I .f PUMP VALVEWITH GAS CHAMBER IN GAGE I Elmer G. Ware, Bakersfield, Calif.Application August 27, 1938, Serial No. 227,162

1 Claim.

My invention relates to improvements in a pump valve with gas chamber incage, and it consists of the combinations, constructions andarrangements hereinafter described and claimed.

.5 In the pumping of oil, the metal ball valve The heavy force of theseating impact has a tend ency to cause the ball and seat to wearexcessively or chip.

The principal object of my invention is to pro- 20 vide a gas chamber atthe top of the ball passageway for accelerating the initial movement of.the ball toward the valve seat and acting as a gas cushioning chamberfor lessening the shock of the ball at the instant of seating in muchthe areciproeating pump. I p

A further object of my invention is to provide a device of the typedescribed which is simple in construction and is durable. and efficientfor the purpose intended.

Other objects and advantages will appear in I the followingspecification, and the novel features of the device will be particularlypointedout in the appended claim. I 3.3 My invention is illustrated inthe accompanying drawing forming a part of this application, in. whichFigure 1 is a vertical section through an oil well tubing showing thepump cage with the gas chamber; and t I Figure 2 is an enlargedsectional view of a portion of the pump cage.

In carrying out my invention, I provide a pump cage indicated at I andthis cage has a ball guideway 2 therein. I The wall of the passageway isprovided with openings or windows 3 through which oil can pass. A ballvalve seat 51 is placed due to the weight of the column of oil above it.

same manner as the air :chamber functions on a threaded shank 9receivable in a threaded portion Ill of the rods 8.

The parts thus far described, form no part of my invention, exceptinsofar as they cooperate with my invention as now to be described. The

cage I has a gas chamber II formed at the top of the ball passageway orguideway 2 and this chamber has an outwardly flared entrance opening I2toward which the ball 'I' moves when in raised position. In Figure 1 Ishow the pump rods 8 operatively mounted in a pump body I3. The pumpplunger or cup assembly is carried by the cage I and is shown supportinga plurality of cups I4 of standard construction. The cups move along theinner surface of the pump body I3 in the usual manner. A standing ballvalve cage i5 is shown secured to the pump body I3 parts of the device,the operation thereof may be readily understood.

The pump rods 8 are recipro cated in the usual manner by a powermechanism not shown, and

on'the down stroke the ball valve IE will close and the ball I will beraised dueto the fact that oil is trapped in the pump body I3 above theball valve 5.. On the up stroke,-the ball valve A partial vacuum will beformed in the portion of the pump body I3 disposed below the valve 1 andthis will open the valve I6 and will draw a fresh supply of oil abovethe lower valve. Oil will sometimes pass the valve I6 under its ownpressure and in such instances this will aid the partial vacuum todeliver oil into the pump body.

The difficulty with this type of operation is thatthe ball valve .1 willseat immediately prior to the up stroke and in seating will deliver ahammer-like blow clue to the descending weight of the fluid column abovethe valve. Thisw ill cause undue Wear or chipping between the ball andthe valve seat and may even cause the ball or valve seat to break. Withthe gas chamber H, the ball will be initially started toward the valveseat by the gas due to its pressure and lower viscosity. Furthermore, atthe instant of seating of the ball,. the blow normally caused by the oilcolumn acting on the ball will be cushioned because the oilwill tend toflow into the gas chamber to compress thegas andthe gas in the chamberwill cushion the impact in much the same manner as the functioning of anair chamber in a reciprocating pump. The gas chamber IT in the cage [5acts in the same manner. The gas will continually fill both recesses iiand I! because the recesses will be constantly replenished by the gasescaping from the oil flowing through the pump.

It is to be undestood that the term oil is to be considered broad enoughto include any fluid body.

The seat 5 may be provided with an insert (not shown) of a hard metalalloy to resist Wear. The seat lea for the'ball valve It: may belikewise provided with a hard metal insert.

While I have shown only the preferred form of my invention, it should beunderstood that vari ous changes or modifications may be made within thescope of the appended claim without departing from the spirit of theinvention.

' I claim:

In combination withthe barrel of a pump, a cage located in said barrel,said cage being internally bored to provide a ball guideway and slottedin the wall resulting from the bore for. the passage of fluid, said cagebeing counterbored Irom the upper end of the internal bore to provide aclosed-ended surge chamber and being flared at its entrance to form avalve seat at the upper end of the guideway, a complemental seat carriedby the cage at the lower end of the guideway, and a ball valveconstituting the sole occupant of the guideway, being movable thereinbut directly subject to restriction in one of its seating movements bythe diversion of the fluid into the surge chamber when said valve is inthe action of seatingon the lower seat.

ELMER 'G. WARE.

